Ammunition cartridge for a firearm



FIG. 1 is a top, front, right side perspective view of an ammunition cartridge for a firearm in accordance with my new design;

FIG. 2 is top, rear, left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

All portions shown in broken lines are environmental and illustrative only and form no part of the claimed design. 

CLAIM The ornamental design for an ammunition cartridge for a firearm, as shown and described. 